Percolation wave propagation, and void link-up effects in ductile fracture

This work investigates the time evolution and spatial morphology of ductile damage based on void growth and coalescence. The size enhancement of damage cluster growth, as well as wave speed limiting of growth, are treated microscopically. Simplified 2D plane strain simulations using individual voids are done with uniaxial strain and explained with a probabilistic theory. At low strain rates, fracture occurs by long, localized cracks. At high strain rates, widespread, random damage breaks the system